The OctaLock™ Uncork'd lid features our 100% leakproof BevLock™ lid to seal in your beverages and stop leaks, OctaLock™ thread system to make taking your lid on and off a breeze and allows you to place it in your favorite of 8 sipping positions, and our MagFlip™ technology to assist in keeping your lid open while you sip. Bring your favorite hot, cold, or iced carbonated beverage wherever, whenever. Fits all Uncork'd 14oz tumblers.